fluid_lib/bucket/init.lua

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-- Minetest 0.4 mod: bucket
-- See README.md for licensing and other information.
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local napi = minetest.get_modpath("node_io")
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minetest.register_alias("bucket", "bucket:bucket_empty")
minetest.register_alias("bucket_water", "bucket:bucket_water")
minetest.register_alias("bucket_lava", "bucket:bucket_lava")
minetest.register_craft({
output = 'bucket:bucket_empty 1',
recipe = {
{'default:steel_ingot', '', 'default:steel_ingot'},
{'', 'default:steel_ingot', ''},
}
})
bucket = {}
bucket.liquids = {}
local function check_protection(pos, name, text)
if minetest.is_protected(pos, name) then
minetest.log("action", (name ~= "" and name or "A mod")
.. " tried to " .. text
.. " at protected position "
.. minetest.pos_to_string(pos)
.. " with a bucket")
minetest.record_protection_violation(pos, name)
return true
end
return false
end
-- Register a new liquid
-- source = name of the source node
-- flowing = name of the flowing node
-- itemname = name of the new bucket item (or nil if liquid is not takeable)
-- inventory_image = texture of the new bucket item (ignored if itemname == nil)
-- name = text description of the bucket item
-- groups = (optional) groups of the bucket item, for example {water_bucket = 1}
-- force_renew = (optional) bool. Force the liquid source to renew if it has a
-- source neighbour, even if defined as 'liquid_renewable = false'.
-- Needed to avoid creating holes in sloping rivers.
-- This function can be called from any mod (that depends on bucket).
function bucket.register_liquid(source, flowing, itemname, inventory_image, name,
groups, force_renew)
bucket.liquids[source] = {
source = source,
flowing = flowing,
itemname = itemname,
force_renew = force_renew,
}
bucket.liquids[flowing] = bucket.liquids[source]
if itemname ~= nil then
-- Create an image using a color
if inventory_image:match("^#") then
inventory_image = "bucket.png^(bucket_mask.png^[multiply:".. inventory_image ..")"
end
minetest.register_craftitem(itemname, {
description = name,
inventory_image = inventory_image,
stack_max = 1,
liquids_pointable = true,
groups = groups,
on_place = function(itemstack, user, pointed_thing)
-- Must be pointing to node
if pointed_thing.type ~= "node" then
return
end
local node = minetest.get_node_or_nil(pointed_thing.under)
local ndef = node and minetest.registered_nodes[node.name]
-- Call on_rightclick if the pointed node defines it
if ndef and ndef.on_rightclick and
not (user and user:is_player() and
user:get_player_control().sneak) then
return ndef.on_rightclick(
pointed_thing.under,
node, user,
itemstack)
end
local lpos
-- Check if pointing to a buildable node
if ndef and ndef.buildable_to then
-- buildable; replace the node
lpos = pointed_thing.under
else
-- not buildable to; place the liquid above
-- check if the node above can be replaced
lpos = pointed_thing.above
node = minetest.get_node_or_nil(lpos)
local above_ndef = node and minetest.registered_nodes[node.name]
if not above_ndef or not above_ndef.buildable_to then
-- do not remove the bucket with the liquid
return itemstack
end
end
if check_protection(lpos, user
and user:get_player_name()
or "", "place "..source) then
return
end
-- Fill any fluid buffers if present
local place = true
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local ppos = pointed_thing.under
local node = minetest.get_node(ppos)
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-- Node IO Support
local usedef = ndef
local defpref = "node_io_"
local lookat = "N"
if napi then
usedef = node_io
lookat = node_io.get_pointed_side(user, pointed_thing)
defpref = ""
end
if usedef[defpref..'can_put_liquid'] and usedef[defpref..'can_put_liquid'](ppos, node, lookat) then
if usedef[defpref..'room_for_liquid'](ppos, node, lookat, source, 1000) >= 1000 then
usedef[defpref..'put_liquid'](ppos, node, lookat, user, source, 1000)
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if ndef.on_timer then
minetest.get_node_timer(ppos):start(ndef.node_timer_seconds or 1.0)
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end
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place = false
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end
end
if place then
minetest.set_node(lpos, {name = source})
end
return ItemStack("bucket:bucket_empty")
end
})
end
end
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function bucket.get_liquid_for_bucket(itemname)
local found = nil
for source, b in pairs(bucket.liquids) do
if b.itemname and b.itemname == itemname then
found = source
break
end
end
return found
end
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minetest.register_craftitem("bucket:bucket_empty", {
description = "Empty Bucket",
inventory_image = "bucket.png",
stack_max = 99,
liquids_pointable = true,
groups = {bucket_empty = 1},
on_use = function(itemstack, user, pointed_thing)
if pointed_thing.type == "object" then
pointed_thing.ref:punch(user, 1.0, { full_punch_interval=1.0 }, nil)
return user:get_wielded_item()
elseif pointed_thing.type ~= "node" then
-- do nothing if it's neither object nor node
return
end
-- Check if pointing to a liquid source
local node = minetest.get_node(pointed_thing.under)
local liquiddef = bucket.liquids[node.name]
local item_count = user:get_wielded_item():get_count()
if liquiddef ~= nil
and liquiddef.itemname ~= nil
and node.name == liquiddef.source then
if check_protection(pointed_thing.under,
user:get_player_name(),
"take ".. node.name) then
return
end
-- default set to return filled bucket
local giving_back = liquiddef.itemname
-- check if holding more than 1 empty bucket
if item_count > 1 then
-- if space in inventory add filled bucked, otherwise drop as item
local inv = user:get_inventory()
if inv:room_for_item("main", {name=liquiddef.itemname}) then
inv:add_item("main", liquiddef.itemname)
else
local pos = user:getpos()
pos.y = math.floor(pos.y + 0.5)
minetest.add_item(pos, liquiddef.itemname)
end
-- set to return empty buckets minus 1
giving_back = "bucket:bucket_empty "..tostring(item_count-1)
end
-- force_renew requires a source neighbour
local source_neighbor = false
if liquiddef.force_renew then
source_neighbor =
minetest.find_node_near(pointed_thing.under, 1, liquiddef.source)
end
if not (source_neighbor and liquiddef.force_renew) then
minetest.add_node(pointed_thing.under, {name = "air"})
end
return ItemStack(giving_back)
else
-- non-liquid nodes will have their on_punch triggered
local node_def = minetest.registered_nodes[node.name]
if node_def then
node_def.on_punch(pointed_thing.under, node, user, pointed_thing)
end
return user:get_wielded_item()
end
end,
on_place = function(itemstack, user, pointed_thing)
-- Must be pointing to node
if pointed_thing.type ~= "node" then
return
end
local lpos = pointed_thing.under
local node = minetest.get_node_or_nil(lpos)
local ndef = node and minetest.registered_nodes[node.name]
-- Call on_rightclick if the pointed node defines it
if ndef and ndef.on_rightclick and
not (user and user:is_player() and
user:get_player_control().sneak) then
return ndef.on_rightclick(
lpos,
node, user,
itemstack)
end
if check_protection(lpos, user
and user:get_player_name()
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or "", "take "..node.name) then
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return
end
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-- Node IO Support
local usedef = ndef
local defpref = "node_io_"
local lookat = "N"
if napi then
usedef = node_io
lookat = node_io.get_pointed_side(user, pointed_thing)
defpref = ""
end
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-- Remove fluid from buffers if present
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if usedef[defpref..'can_take_liquid'] and usedef[defpref..'can_take_liquid'](lpos, node, lookat) then
local bfc = usedef[defpref..'get_liquid_size'](lpos, node, lookat)
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local buffers = {}
for i = 1, bfc do
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buffers[i] = usedef[defpref..'get_liquid_name'](lpos, node, lookat, i)
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end
if #buffers > 0 then
for id,fluid in pairs(buffers) do
if fluid ~= "" then
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local took = usedef[defpref..'take_liquid'](lpos, node, lookat, user, fluid, 1000)
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if took.millibuckets == 1000 and took.name == fluid then
if bucket.liquids[fluid] then
itemstack = ItemStack(bucket.liquids[fluid].itemname)
if ndef.on_timer then
minetest.get_node_timer(lpos):start(ndef.node_timer_seconds or 1.0)
end
break
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end
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end
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end
end
end
end
return itemstack
end
})
bucket.register_liquid(
"default:water_source",
"default:water_flowing",
"bucket:bucket_water",
"bucket_water.png",
"Water Bucket",
{water_bucket = 1}
)
-- River water source is 'liquid_renewable = false' to avoid horizontal spread
-- of water sources in sloping rivers that can cause water to overflow
-- riverbanks and cause floods.
-- River water source is instead made renewable by the 'force renew' option
-- used here.
bucket.register_liquid(
"default:river_water_source",
"default:river_water_flowing",
"bucket:bucket_river_water",
"bucket_river_water.png",
"River Water Bucket",
{water_bucket = 1},
true
)
bucket.register_liquid(
"default:lava_source",
"default:lava_flowing",
"bucket:bucket_lava",
"bucket_lava.png",
"Lava Bucket"
)
minetest.register_craft({
type = "fuel",
recipe = "bucket:bucket_lava",
burntime = 60,
replacements = {{"bucket:bucket_lava", "bucket:bucket_empty"}},
})